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Finding the Fourth Proportional to 319.93, 440.58 and 300.15

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Solution

The fourth proportional to 319.93, 440.58 and 300.15 is: 413.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.93 : 440.58 = 300.15 : x
  2. Step 2: Convert to fraction form
    319.93/440.58 = 300.15/x
  3. Step 3: Cross multiply
    319.93x = 440.58 × 300.15
  4. Step 4: Simplify right side
    319.93x = 132,240.09
  5. Step 5: Solve for x
    x = 132,240.09/319.93
  6. Step 6: Final answer
    x = 413.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.